PAT 1082. Read Number in Chinese (25)

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Given an integer with no more than 9 digits, you are supposed to read it in the traditional Chinese way. Output Fu first if it is negative. For example, -123456789 is read as Fu yi Yi er Qian san Bai si Shi wu Wan liu Qian qi Bai ba Shi jiu. Note: zero (ling) must be handled correctly according to the Chinese tradition. For example, 100800 is yi Shi Wan ling ba Bai.

Input Specification:

Each input file contains one test case, which gives an integer with no more than 9 digits.

Output Specification:

For each test case, print in a line the Chinese way of reading the number. The characters are separated by a space and there must be no extra space at the end of the line.

Sample Input 1:

-123456789

Sample Output 1:

Fu yi Yi er Qian san Bai si Shi wu Wan liu Qian qi Bai ba Shi jiu

Sample Input 2:

100800

Sample Output 2:

yi Shi Wan ling ba Bai

先将数字对应字符串的值和位对应字符串的值构造出来。如果0位置的字符是负号，就将字符串的0位置去掉。每次去输出0位置的值，如果0位置的值是零并且是万位，就输出Wan；如果0位置的值不是零，查看当前位置的前几次有没有零值，有就要输出ling，然后输出0位置的值和所在的位。

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#include <iostream>
#include <map>
#include <string>

using namespace std;

map<char, string> initMap() {
    map<char, string> res;
    res['0'] = "ling";
    res['1'] = "yi";
    res['2'] = "er";
    res['3'] = "san";
    res['4'] = "si";
    res['5'] = "wu";
    res['6'] = "liu";
    res['7'] = "qi";
    res['8'] = "ba";
    res['9'] = "jiu";
    return res;
}

map<int, string> initSiteMap() {
    map<int, string> res;
    res[2] = "Shi";
    res[3] = "Bai";
    res[4] = "Qian";
    res[5] = "Wan";
    res[6] = "Shi";
    res[7] = "Bai";
    res[8] = "Qian";
    res[9] = "Yi";
    return res;
}

int main() {
    string num;
    cin >> num;
    if (num[0] == '-') {
        cout << "Fu ";
        num = num.substr(1);
    }
    map<char, string> unit = initMap();
    map<int, string> site = initSiteMap();
    bool isZero = false;
    cout << unit[num[0]];
    if (num.length() > 1) {
        cout << " " << site[num.length()];
    }
    num = num.substr(1);
    while (num.length() > 0) {
        if (num[0] == '0') {
            isZero = true;
            if (num.length() == 5) {
                cout << " " << site[5];
            }
        } else {
            if (isZero) {
                cout << " ling";
            }
            isZero = false;
            cout << " " << unit[num[0]];
            if (num.length() > 1) {
                cout << " " << site[num.length()];
            }
        }
        num = num.substr(1);
    }
    cout << "Hello World." << endl;
    return 0;
}